Malicious PDF — malware analysis report

Static analysis result for SHA-256 30173e41448cd55b…

MALICIOUS

PDF

86.3 KB Created: 2021-05-06 02:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e2b3b131570258872ad0ddb0a32f5c6c SHA-1: f20fd95f2cdac06abb88d4413fa7f1f08eb9f7d9 SHA-256: 30173e41448cd55b537b1358492ccc0277b3a4610f7e6ced6852e33d254dd3f3
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'Romeo and Juliet study guide answers PDF'. The presence of numerous external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/strik?utm_term=romeo+and+juliet+act+1+study+guide+answers+pdf PDF link annotation
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/a3c02dd53466f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_601da480b6c79.pdfIn PDF document text
    • https://bepagiji.weebly.com/uploads/1/3/4/3/134352373/foxizenituf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5ffa79965111e.pdfIn PDF document text
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/jipitelide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_602855465d427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_600dc18212334.pdfIn PDF document text
    • https://sazizilas.weebly.com/uploads/1/3/0/8/130874530/zifigav-kuvakimifi-xazonuloberakek.pdfIn PDF document text
    • https://zadidiboz.weebly.com/uploads/1/3/5/2/135295834/cf5376.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/93c7d69b0d7.pdfIn PDF document text
    • https://linulozaf.weebly.com/uploads/1/3/1/4/131437298/71bca2.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/kuferimapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446776/normal_60293d7753d56.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/kuzaj-wuxara-zereforolekur-tiguma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_6004b87ded0f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_60501dba62ac5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414491/normal_5ff913f8ce7b0.pdfIn PDF document text
    • https://fasosizive.weebly.com/uploads/1/3/4/3/134351581/9329140.pdfIn PDF document text
    • https://dafufiwe.weebly.com/uploads/1/3/4/3/134368649/21bceae2.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/4699502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_6046a7af3c396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/99a8b0ef-b03a-4368-874e-1860ae59015b/sazelilurejuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c95efe-9503-4301-85ca-21b11554e62c/45490893097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ec2620-9279-469e-8dfe-da2da4ca7872/cobra_360_laser_9_band_esd_767_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c865809e-1806-4ce7-a605-097803d00f1c/supul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa23fea-e790-4742-8a6a-50916651a024/pinamukivilejimi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BB 5684 bytes
SHA-256: a05d97ec059b221c8267acc3be81681b25f764fdb38d2ea6a8216b63d4717a3b
font_01_sfnt_off0001141c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141C 11588 bytes
SHA-256: 1544c23992226238e85e107307664816cb724188fcab57b3268abdb7ab27fbc3
font_02_sfnt_off00013b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B52 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3